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YUI.add('dom-style', function (Y, NAME) {
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/**
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* Add style management functionality to DOM.
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* @module dom
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* @submodule dom-style
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* @for DOM
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*/
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var DOCUMENT_ELEMENT = 'documentElement',
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DEFAULT_VIEW = 'defaultView',
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OWNER_DOCUMENT = 'ownerDocument',
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STYLE = 'style',
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FLOAT = 'float',
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CSS_FLOAT = 'cssFloat',
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STYLE_FLOAT = 'styleFloat',
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TRANSPARENT = 'transparent',
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GET_COMPUTED_STYLE = 'getComputedStyle',
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GET_BOUNDING_CLIENT_RECT = 'getBoundingClientRect',
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DOCUMENT = Y.config.doc,
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Y_DOM = Y.DOM,
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TRANSFORM,
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TRANSFORMORIGIN,
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VENDOR_TRANSFORM = [
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'WebkitTransform',
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'MozTransform',
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'OTransform',
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'msTransform',
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'transform'
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],
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re_unit = /width|height|top|left|right|bottom|margin|padding/i;
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Y.Array.each(VENDOR_TRANSFORM, function(val) {
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if (val in DOCUMENT[DOCUMENT_ELEMENT].style) {
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TRANSFORM = val;
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TRANSFORMORIGIN = val + "Origin";
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}
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});
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Y.mix(Y_DOM, {
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DEFAULT_UNIT: 'px',
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CUSTOM_STYLES: {
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},
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/**
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* Sets a style property for a given element.
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* @method setStyle
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* @param {HTMLElement} node The HTMLElement to apply the style to.
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* @param {String} att The style property to set.
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* @param {String|Number} val The value.
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* @param {Object} [style] The style node. Defaults to `node.style`.
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*/
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setStyle: function(node, att, val, style) {
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style = style || node.style;
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var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES;
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if (style) {
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if (val === null || val === '') { // normalize unsetting
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val = '';
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} else if (!isNaN(Number(val)) && re_unit.test(att)) { // number values may need a unit
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val += Y_DOM.DEFAULT_UNIT;
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}
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if (att in CUSTOM_STYLES) {
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if (CUSTOM_STYLES[att].set) {
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CUSTOM_STYLES[att].set(node, val, style);
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return; // NOTE: return
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} else if (typeof CUSTOM_STYLES[att] === 'string') {
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att = CUSTOM_STYLES[att];
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}
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} else if (att === '') { // unset inline styles
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att = 'cssText';
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val = '';
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}
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style[att] = val;
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}
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},
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/**
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* Returns the current style value for the given property.
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* @method getStyle
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* @param {HTMLElement} node The HTMLElement to get the style from.
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* @param {String} att The style property to get.
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* @param {Object} [style] The style node. Defaults to `node.style`.
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*/
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getStyle: function(node, att, style) {
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style = style || node.style;
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var CUSTOM_STYLES = Y_DOM.CUSTOM_STYLES,
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val = '';
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if (style) {
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if (att in CUSTOM_STYLES) {
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if (CUSTOM_STYLES[att].get) {
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return CUSTOM_STYLES[att].get(node, att, style); // NOTE: return
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} else if (typeof CUSTOM_STYLES[att] === 'string') {
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att = CUSTOM_STYLES[att];
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}
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}
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val = style[att];
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if (val === '') { // TODO: is empty string sufficient?
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val = Y_DOM[GET_COMPUTED_STYLE](node, att);
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}
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}
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return val;
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},
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/**
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* Sets multiple style properties.
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* @method setStyles
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* @param {HTMLElement} node The HTMLElement to apply the styles to.
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* @param {Object} hash An object literal of property:value pairs.
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*/
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setStyles: function(node, hash) {
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var style = node.style;
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Y.each(hash, function(v, n) {
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Y_DOM.setStyle(node, n, v, style);
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}, Y_DOM);
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},
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/**
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* Returns the computed style for the given node.
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* @method getComputedStyle
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* @param {HTMLElement} node The HTMLElement to get the style from.
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* @param {String} att The style property to get.
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* @return {String} The computed value of the style property.
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*/
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getComputedStyle: function(node, att) {
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var val = '',
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doc = node[OWNER_DOCUMENT],
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computed;
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if (node[STYLE] && doc[DEFAULT_VIEW] && doc[DEFAULT_VIEW][GET_COMPUTED_STYLE]) {
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computed = doc[DEFAULT_VIEW][GET_COMPUTED_STYLE](node, null);
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if (computed) { // FF may be null in some cases (ticket #2530548)
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val = computed[att];
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}
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}
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return val;
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}
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});
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// normalize reserved word float alternatives ("cssFloat" or "styleFloat")
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if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][CSS_FLOAT] !== undefined) {
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Y_DOM.CUSTOM_STYLES[FLOAT] = CSS_FLOAT;
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} else if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][STYLE_FLOAT] !== undefined) {
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Y_DOM.CUSTOM_STYLES[FLOAT] = STYLE_FLOAT;
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}
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// safari converts transparent to rgba(), others use "transparent"
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if (Y.UA.webkit) {
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Y_DOM[GET_COMPUTED_STYLE] = function(node, att) {
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var view = node[OWNER_DOCUMENT][DEFAULT_VIEW],
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val = view[GET_COMPUTED_STYLE](node, '')[att];
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if (val === 'rgba(0, 0, 0, 0)') {
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val = TRANSPARENT;
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}
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return val;
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};
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}
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Y.DOM._getAttrOffset = function(node, attr) {
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var val = Y.DOM[GET_COMPUTED_STYLE](node, attr),
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offsetParent = node.offsetParent,
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position,
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parentOffset,
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offset;
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if (val === 'auto') {
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position = Y.DOM.getStyle(node, 'position');
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if (position === 'static' || position === 'relative') {
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val = 0;
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} else if (offsetParent && offsetParent[GET_BOUNDING_CLIENT_RECT]) {
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parentOffset = offsetParent[GET_BOUNDING_CLIENT_RECT]()[attr];
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offset = node[GET_BOUNDING_CLIENT_RECT]()[attr];
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if (attr === 'left' || attr === 'top') {
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val = offset - parentOffset;
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} else {
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val = parentOffset - node[GET_BOUNDING_CLIENT_RECT]()[attr];
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}
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}
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}
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return val;
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};
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Y.DOM._getOffset = function(node) {
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var pos,
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xy = null;
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if (node) {
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pos = Y_DOM.getStyle(node, 'position');
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xy = [
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parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'left'), 10),
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parseInt(Y_DOM[GET_COMPUTED_STYLE](node, 'top'), 10)
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];
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if ( isNaN(xy[0]) ) { // in case of 'auto'
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xy[0] = parseInt(Y_DOM.getStyle(node, 'left'), 10); // try inline
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if ( isNaN(xy[0]) ) { // default to offset value
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xy[0] = (pos === 'relative') ? 0 : node.offsetLeft || 0;
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}
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}
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if ( isNaN(xy[1]) ) { // in case of 'auto'
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xy[1] = parseInt(Y_DOM.getStyle(node, 'top'), 10); // try inline
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if ( isNaN(xy[1]) ) { // default to offset value
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xy[1] = (pos === 'relative') ? 0 : node.offsetTop || 0;
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}
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}
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}
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return xy;
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};
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if (TRANSFORM) {
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Y_DOM.CUSTOM_STYLES.transform = {
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set: function(node, val, style) {
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style[TRANSFORM] = val;
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},
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get: function(node) {
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return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORM);
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}
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};
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Y_DOM.CUSTOM_STYLES.transformOrigin = {
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set: function(node, val, style) {
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style[TRANSFORMORIGIN] = val;
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},
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get: function(node) {
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return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORMORIGIN);
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}
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};
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}
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}, '3.18.1', {"requires": ["dom-base"]});
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